The file typically refers to Episode 45 of the anime Fullmetal Alchemist: Brotherhood , titled " The Promised Day ." This episode is a pivotal turning point that kicks off the final arc of the series, focusing on the mobilization of various factions for a massive upcoming conflict. Episode 45 Summary & Key Events
In this episode, several major plotlines converge as characters prepare for the "Promised Day," the date when the primary antagonist, Father, plans to activate his nationwide transmutation circle.